GeForce GT 640M LE and Radeon HD 7490M - video card comparison
GeForce GT 640M LE
Radeon HD 7490M
Architecture
Fermi / Kepler (2012)
Terascale 2 (2009−2015)
GPU code name
N13P-LP
Seymour XTX
Market segment
Laptop
Laptop
Release date
March 2012
December 2011
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Core clock speed
Up to 500 MHz
800 MHz
CUDA cores
Up to 384
-
Floating-point performance
384.0 gflops
256.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
585 million
370 million
Pipelines / CUDA cores
384
160
Power consumption (TDP)
20 Watt
9 Watt
Texture fill rate
Up to 16.0 billion/sec
6.400
Memory type
DDR3\DDR5
GDDR5
Maximum RAM amount
2 GB
512 MB
Memory bus width
128bit
64 Bit
Memory clock speed
1800 - 4000 MHz
3800 MHz
Memory bandwidth
Up to 28.8 GB/s
30.4 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
11.2 (11_0)
CUDA
+
-
OpenCL
1.1
1.2
OpenGL
4.5
4.4
Shader Model
5.1
5.0
Vulkan
N/A
N/A
3D Blu-Ray
+
-
Optimus
+
-